Posted by
NK7Z on
Jan 13, 2019; 8:43pm
URL: http://elecraft.85.s1.nabble.com/K3-Receiver-recovery-time-tp7648024p7648047.html
Hi Don,
Thanks for the combined brain power! I have a plan for testing if it
ever gets that far. I am just trying to see if the K3 receiver recovers
sufficiently fast in a general sort of way first.
I believe I could look at RF levels on the IF while transmitting, (using
a different transmitter and a storage scope to look at the K3 IF), then
just drop the carrier while still looking at the levels with that scope.
When I see signals return to the IF I have the recovery time of the
receiver.
I am just trying to skip that step hoping someone actually knows the
recovery time of the receiver, as opposed to actual testing.
If the K3 is even close, I will set up test jig for it, if not, then
I'll look for a better way.
Thanks again for your thoughts here!
73s and thanks,
Dave (NK7Z)
https://www.nk7z.netAward Manager, 30MDG Grid Contest
ARRL Technical Specialist
ARRL Volunteer Examiner
ARRL OOC for Oregon
On 1/13/19 11:53 AM, Don Wilhelm wrote:
> Dave,
>
> I am trying to think of how you might test it.
> The best I can think of is to listen to both a noise source and an XG3
> sending a CW string of dots. Increase the speed of the CW sent by the
> XG3 until you can no longer hear the noise source between dits.
> Then either calculate the off times for the dits or measure it on an
> oscilloscope.
>
> 73,
> Don W3FPR
>
> On 1/13/2019 2:07 PM, Dave Cole (NK7Z) wrote:
>> Hi again Scott,
>>
>> Thank you for your answer, but I am not being clear.
>>
>> Not during break in, just sitting there in receive... If the radio is
>> hit with an S9+ signal, how long after the S9+ signal terminates
>> before the K3 receiver recovers enough to show an weak signal on the
>> IF... No T/R happening, just sitting there in receive.
>>
>> You are close to what I am looking for... I am investigating the
>> possibility of using the K3 as the receiver portion in a homebrew
>> bistatic radar setup running in the HF spectrum.
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